Finding the Fourth Proportional to 1,919.84, 2,648.72 and 1,163.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,919.84 : 2,648.72 = 1,163.86 : x
2. Step 2: Convert to fraction form
   1,919.84/2,648.72 = 1,163.86/x
3. Step 3: Cross multiply
   1,919.84x = 2,648.72 × 1,163.86
4. Step 4: Simplify right side
   1,919.84x = 3,082,750.90
5. Step 5: Solve for x
   x = 3,082,750.90/1,919.84
6. Step 6: Final answer
   x = 1,605.73